London Bridge Area Signalling Centre (ASC) is a signalling centre on the Kent Route of Network Rail, principally covering the line from London (Charing Cross, Cannon Street and London Bridge) to Kent and Sussex route areas of Network Rail. The signalling centre opened in 1974. The centre covers 140 miles of track and over 2000 trains a day.

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The building behind the gate inAlaska Factory was built by Wallis Gilbert. Itwas built some time before the 1950's. They used to fire watch on top of thebuilding during the second world war. In it's original state Alaska factorywas as a lovely set of buildings a mixture of 1930's and victorian architecture.